US724574A - Stop-motion for machines for preparing fibrous material. - Google Patents

Description

No. 724,574. PATENTEDAPR, 7,1903.

H c. T! HAW-LEY. STOP MOTION FOR MACHINES FOR PREPARING FIBROUS MATERIAL.

APPLIUATIUN'FIL ED-JANJ 27, 1902. v H0 MODEL. I 6 SHEETB.SHEBT -1.

P 1 b Q No. 724,574. PATENTBD APR, 7, 1903.

0. T. HAWLEY. STOP MOTION PORMAGHINES FOR PREPARING FIBROUS MATERIAL.

APPLICATION FILED JAN. 27, 1902.

5 SHEETS-SHEET 2.

NAWEAEVA. PATEN'I'ED APR, 7, 1903. c. T. HAWLEY.

STOP MOTION FOR MACHINES Eo-E PREPARING FIBROUS MATERIAL.

APPLICATION FILED JAN. 27, 1902. HOMODEL. a SHEETS-SHEET a.

In (,1 In, 1 [III II PATENTED APR, 7-, 1903.

-c. T. HAWLBY. STOP MOTION FOR MACHINES FOR PREPARING FIBROUS MATERIAL APPLICATION FILED 141:. 21, 1902. FO'MODEL. a BHBETB-SHEBT 5,

' UNITED STATES PATENT OFFI E.

DRAPER COMPANY, or HOPEDALE,

TION OF MAINE.

MASSACHUSETTS, A CORPORA- -STOP-M( )T|0N FOR MACHINES;FOR, PR EPARlNG'flBROUS MATERIAL.

SPECIFICATION forming part of Letters Patent No. 724,574, dated April 7, 1903 Application filed January 2'], I902. Serial No. 9].;343- (N0 model.)

To all whom it may concern:

Beit known that 1, CHARLES T. HAWLEY, a citizen of the United States, residing at Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement; in Stop-Motions for Machines for Preparing Fibrous Material,of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

In machines for preparing fibrous material-such as slubbing, intermediate, and. roving framesa plurality of slivers are led through suitable guides and united into one roving by suitable drawing-rolls, the latter attenuating the slivers, andthereby decreasing their strength, which loss is compensated for by imparting twist to the roving as it is wound upon a suitable bobbin, the twist being produced by a flier, for instance. Now if one sliver of a set breaks without immediate detection and piecing up the roving of that set will not be uniform or of the requisite thickness and singles, as technically, termed, will be formed. Various devices have been employed for preventing singles, such apparatus providing for. the automatic breakage of a sliver upon the accidental breakage of its fellow in' the set, so that a single is prevented; but manifestly there is thus created a break in the roving of such set. In a frame provided with a number of rotatable spindles to support bobbins upon which a corresponding number of rovings are wound it is usual to provide driving mechanism which drives the rolls, fliers, and traverse devices at constant speed, and the spindles, with the bobbins thereon, are driven at variable speed to give constant surface speed to the bobbins as they increase in size, such speed being the same for all of the spindles at any given time. It will be manifest, therefore, that if upon breakage of a sliver of any one set its fellow is broken, automatically preventing a single, but causing a break in the roving, the bobbin to which the latter is delivered will fall behind the others by just so much time as elapses before the break is repaired and the delivery of the roving continued. The roving on a drawing-frame is I I so slack-twisted that itwill stand no drag, as

by a traveler on a spinning-ring, but it must .be laid on .the bobbin at exactly the same speed it is delivered by the rollsthat is, the difference' in speedof rotation between the flier and the bobbin must vary, so that this difference at any time multiplied by the circumferenceof the bobbin at the same time shall give a constant which is equal to the length of roving delivered by the rolls in the given time less a certain percentage taken up in twist. Consequently if a bobbin is allowed to run without roving for any considerable length of time it is too small when pieced up for the difierence in speed then found, and there is too small surface speed relative to the flier, and the roving is not wound upon the bobbin as fast as it is delivered by the rolls. It is thus impossible to run a bobbin materially smaller than the others in the set. It is necessary, therefore, in an apparatus of this character to stopthe frame as awholewhen for any reason the contin uity of any roving is interrupted and when but the output of the frame is made substantially uniform and very perfect.

The various novel features of my invention will be fully described hereinafter and particularly pointed out in the following claims.

Figure l is a top or plan view of the driving end of a machine for preparing fibrousrnaterial with oneembodiment of my invention applied thereto, the apparatus being-at rest. Fig. 2 is a rear elevation of the apparatus shown in Fig. 1, the bobbins from which the slivers are drawn being omitted to more clearly showthe novel parts of the apparatus. Fig. 2 is a detail of the brake-controlling mechanism to be described. Fig. 3 is a detail of a part of the brake mechanism in side elevation viewing Fig. 2 from the left. Fig. 4 is a transverse sectional detail, enlarged,

on the the line d4, Fig. 1, looking toward the left. Fig. 5 is a similar view, also enlarged, on the line 5 5, Fig. 1, looking toward the left. Fig. 6 in an enlarged detail of the stop-motion and its controlling means viewed from the front of the frame, the drawing-rolls being omitted. Fig. 7 is an enlarged detail, in front elevation, of the detectors and the cooperating feeler, the front plate being omitted. Fig. 8 is a top or plan view of the same, but with the front plate in place; and Fig. 9 is a sectional detail on the line 9 9,Fig. 6,looking toward the left. Fig. 10 is an enlarged perspective detail of the stop-motion and its controlling means viewed from the front right-hand end of the frame shown in Fig. 1; and Fig. 11 is also a perspective detail of the same mechanism, but viewed from the back of the frame, with the knock-01f lever and detector-releasing device omitted and the tappet-cam shown.

Referring to Figs. 1 to 5, the main frame A, having one end A made box-like to receive the usual driving mechanism (not shown) and of well-known structure in machines of this class, the spindle-rail B, the rotatable spindles B, Fig. 1, and their fliers 13*, the stands D for the sets or heads of drawingrolls, the lower rolls being indicated at d d 01 Fig. 5, and the upper rolls at d d d the trumpet LP, by which the several slivers of a set are collected as they pass to the rolls, and the roll-cover D may be all of usual or well-known construction, the slivers being drawn from bobbins B at the back of the frame. (See dotted lines, Fig. 4.) Rearwardly-extended l-shaped brackets D are secured to the stands D, and their upturned ends D are notched to support two parallel longitudinal guide bars or plates G H, located at a considerable distance back of the rolls, the plate G having guide-eyes g 9', arranged in pairs back of each set of rolls, the arrowheaded part g of the plate between the eyes of each pair acting with the alternating convex portions g Figs. 2 and 7, to direct the slivers readily to the guide-eyes, the overhanging portions of the arrow-heads preventing accidental displacement of the slivers, while the stem separates the slivers s s of each pair. The plates G and H are held together by a series of screw-studs h Figs. 7, 8, and 9, passed through plate G and screwed into plate H, and a sleeve h, having its ends reduced in diameter to form fulcrum-seats h h ,is slipped onto each stud between the plates to maintain them separated while holding them firmly in position. Guide-eyes it h in plate [-1 are located in front of the eyes g g for the slivers s s of a set, herein two slivers constituting a set, they being led from bobbins B (See dotted lines, Fig. 4.)

I have herein shown two series of detectors mounted on and to rock upon the fulcrumseats h 7L2, respectively, the body portions of the sleeves 7t maintaining the two series of detectors separated, and while in the main the detectors are alike I have for convenience indicated them by different reference-letters. The rearmost series of detectors, mounted on the seats h, comprise each an upturned head d and a lateral arm d, extended from the base of the head, and, referring to Figs. 7 and 8, it will be seen that the arms are extended toward the right, and they are long enough to cross the paths of the slivers s of each set between the guide-eyes g h. The detectors of the front series, mounted on the seats 7?, comprise upright heads a and lateral arms 6; but the latter extend toward the left and cross the paths of the slivers s between their guide-eyes g"'h and, referring to Fig. 8, the extremities of the arms are bent rearwardly, as at 6 and on their under edges are shaped to form downturned hooks c Fig. 7. The free ends of the arms d are bent forward, as at 0 and are squared, and by reference to Fig. 8 it will be manifest that the detectors of one series will not interfere with those of the other series. The arm of each detector normally rests upon and is supported by an intact sliver, maintaining the detector in fullline position, Fig. 7, and in order that the strain upon the sliver may be very slight the detector-head is made at an obtuse angle to its arm, serving as a counterpoise.

A feeler, shown as a long bar F, is mounted to reciprocate longitudinally between the plates G and H below the detectors, the feeler having on its upper face a series of notches f to present upright square shoulders f", and as the feeler is reciprocated by means to be described the shoulders move back and forth below the free ends of the detector-arms. If, however, a sliver breaks or becomes so attenuated that it cannot support its detector in normal inoperative position, the detector will rock on its fulcrum-seat and engage one of the shoulders f arresting the movement of the feeler and through means to be described stopping the frame automatically. The stroke of the feeler in the direction of arrow 10, Fig. 7, is its feeling stroke, and if one of the back series of detectors is released its ICC arm d will drop into one of the notchesfand center of the feeler the stopping power is applied centrally thereof.

In Fig. 7 I have shown in dotted linesadetector of each series in released or operative position, and I have also shown at the right in said figure one of the detectors thrown over to swing its arm (1 up out of the way while piecing up a broken sliver. Y

An upright thin blade 9 is secured to each portion g of the guide-bar G between the two slivers of its set to prevent any accidental The end of the feeler F nearest the driving end of the frame is pivotally connected at f loosely with an upturned arm f secured to a transverse rock-shaft f Figs. 1, 2, 4, 6, 10,

' and 11, mounted in bearings a on a stand A secured to the top of the frame, a collar f being secured to the rock-shaft between the bearings and preventing its endwise movement. A second upturned armf on the rockshaft has connected to it by a slot-and-pin connection 21 22, Figs. 6 and 10, a peculiarlyshaped bar, the straight part f thereof being mounted to slide in a hole in an upturned portion a of the stand A and a spring S surrounds the bar between the stand and a collar 23, normally tending to maintain the .parts in the position shown. The spring rocks the rock-shaft in the direction of arrow 24, Figs. 6 and 10, and thereby imparts the feelingstroke to the feeler F.

Referring to Figs 1, 4, 6, 10, and 11, they barf is bent down at f and then forward at f toward the front of the frame, with a longitudinal slot f therein (see Figs. 4 and 11) to receive loosely a headed stud b projecting from the side of a hunter 5, shown as an arm, having its hub b mounted to rock and also to slide longitudinally on a fixed stud 1), secured to the base of the stand A at right angles to the rock-shaft f A friction-roll b is mounted on the upper end of the bunter b,

and the latter has an enlargement b behind.

said roll for a purpose to be described. The rock-shaftfflwhich may be termed the feeler rock-shaft, has secured to it a third arm f? at or near its front end, said arm being turned toward the adjacent end of the frame and hav-v ing preferably a roll mounted on its free end in the path of the tappets i t of a tappetcam '1, Figs. 4 and 11,secured to the shaft (1 the latter being attached to or a continuation of the lower back rolls d and of usual construction. A gear 60 on said shaft (1 meshes with a pinion 61 on an intermediate shaft 62, Fig. 1, supported in abracket 63 on the frame, a large gear 6t on the shaft 62 in turn meshing with a pinion 65 on the extension 66 of the lower front rolls (1, all of usual or well-known construction, the shaft 66 deriving its rotation from the driving mechanism (not shown) in the inclosed end A of the frame, and by such train of gearing the shaft (1 is rotated in the direction of arrow 67, Fig. 4. As each tappet tengages the rollf it will depress the arm f and turn the feelershaftf? oppositely to thearrow 24, Figs. 6, 10, and 11, and the arm f will move the feeler F opposite to arrow 10, Fig. 7, for' the non-feeling stroke, the spring S returning the feelershaft to position shown in Figs.,6, 10, and 11 as soon as the point of the tappet passes the roll f The feeler will vbe reciprocated twice for each complete rotation of the cam-shaft d as will be manifest from the foregoing,

and the feeling stroke of the feeler will be due to the expansion of the spring S so that if the feeler is arrested by a released detector, as has been described, the strain on the detector will be due only to the power of such spring. Every. time the arm f is depressed bya tappet the however, a sliver breaks and releases its detector, the latter will engage and arrest the movement of the feeler on its feeling stroke, and the barf f will maintain the hunter in operative position, so that the tappet will after passing from the roll f. engage the bu-nter-roll b and thereby swing the hunter back, or to the right, Fig. 4', on its fulcrumstud b, the stud b then traveling in the slot f Such movement of the hunter operates to automatically stop the entire frame, as will now be described.

A post A on the frame, near its driving end, has upright bearings (1 a Fig. 6, the former receiving the hub r of a detector-releasing device, shown in Figs. 1 and 10 as an arm 7', supported to swing in a horizontal plane and having a cam-hook r at its free end to cooperate with a pin f on the collar f,.fast on the feeler rock-shaft f, as clearly shown in Fig. 11. The upper bearing a receives the hub of a horizontally-swinging knock-off lever k 70', the arm is having a depending lug k Figs. 1, 2, 6, and 10, behind andin the path of the hooked arm 1. A longitudinal slot k in the arm 7c of the knock off lever is entered by a pin k on the shipperrod K, mounted to slide in suitable bearings 80, one of which is shown in Fig. 1, the rod passing through the box-like end A of the frame, and beyond the latter a suitable belt guide K is secured to the shipper-rod to shift the driving-bolt (not shown) from the fast pulley P to the loose pulley P, and vice versa, said pulleys being mounted on the main driving-shaft P of the frame. (See Fig. 3.) A shipper K Fig. 1, is fulcrumed at on a fixed loracketK and connected by a slot-andpin connection 91 92 with a slide K having an arm K rigidly secured to the shipper-rod,

so that the latter may be moved by hand to stop as well as to start the frame.

For convenience in illustration I have shown the frame as stopped by hand in Fig. 1, the belt being then on the loose pulley P, and

the knock-off lever It lc'will be in the position shown; but the other parts of the stopmotion are shown in the positions assumed at the termination of the feeling-stroke of.

feeler F.

- To start the frame, the shipper K is swung, indirection of arrow 100, Fig. 1, and the inwardl sliding movement of the shippenrod; will throw the end k of the knock-off lever forward to a position just behind and in the path of movement of the enlargement b of the hunter b when the latter is swung to the right, Figs. 4 and 10, by the tappet-cam upon arrest of the feeler by a released detector, as has been described. The depending lug serves to position the hooked arm r, as shown in Figs. 1 and 10, when the knock-01f lever is moved to running position.

So long as the slivers of the various sets remain intact the frame will run; but upon release of a detector the feeler is arrested, the tappet-cam engages the bunter-roll b and the bunter b is operated, being swung back so that its enlargement b will engage the arm 7; and turn the knock-off lever on its fulcrum (L from normal position into the position shown in Figs. 1 and 10, thereby moving the shipper-rod to shift the belt to the loose pulley and stop. the frame. The release of any detector, therefore, by or through breakage of its sliver will thus be made effective to automatically stop the frame. The hunter 7) also engages the hooked arm r at such time and swings the latter toward the back of the frame, it being remembered that the pin f has been swung to the right, Fig. 6, by the turning of the feeler rock-shaftf oppositely to arrow 24; but as the arm 0" approaches its final position its cam-hook r engages the pin f and gives it a slight increment of movement toward the right, still referring to Fig. 6 or to Fig. 1. Such slight movement is suificient, acting through the intervening connections between the rock-shaft f and the feeler F, to move the latter against the spring S far enough to take off the pressure from the detector which arrested the feeler, so that the attendant can with a touch of his finger throw such detector into inoperative position during piecing up of the broken sliver. This pressure-relieving feature is of great convenience, as it obviates the necessity of moving the feeler by hand, so that the released detector can be disengaged therefroma rather difficult and awkward matter to accomplish man ually-and by effecting it automatically the time and attention of the attendant are free to be devoted to the piecing up of the broken sliver and starting the frame with as little loss of time as possible.

By detecting breakage at a considerable distance back of the drawing-rolls, as will be seen from Figs. 1 and 4, the stoppage of the frame will be effected before the broken end of sliver can reach the rolls-an important feature of my invention-for piecing up is then accomplished back of the rolls, and consequently the sliver does not have to be led or reintroduced between the rolls. Time is thus economized and piecing up is more easily done back of the rolls in the open and easilyaccessible part of the frame.

Heretofore the detecting devices have been placed so close to the rolls, so far as I am aware, that the broken end would runpartly' or entirely through the rolls.

I have provided simple brake mechanism to operate automatically when the power is thrown off the frame to effect prompt stoppage of'the parts, and the brake mechanism is shown in Figs. 1, 2, and 3 with the brake set, and in Fig. 2 a part of the brake-con trolling means is shown in normal position when the frame is running.

The usual hand-wheel P secured to or forming a part of the fast pulley, is utilized as the rotatable member of the brake mechanism, and cooperating therewith is a shoe M, pivotally connected at m to the short arm 7% of a bell-crank lever m fulcrumed at m on a suitable bracket secured to the end A of the frame, as shown at Fig. 3, a weight W hung on the long arm m constituting the brake-actuator. The lower end of a link m is pivotally connected at m with the free end of the arm m the upper end of the link being eccentrically connected by a wrist-pin m with a disk m rotatably mounted at m on a suitable bracket M on the frame. A flexible band m, attached at one end to the periphery of the disk m and wound partly around the same, as clearly shown in Fig. 2, is secured at its other end to a collar 102, fast on the shipper-rod K, and when the latter is in stopping position the link m will drop sufficiently to permit the brake to be set by its actuator W. When the shipper-rod is moved to start the frame, the band on turns the disk m in the direction of the arrow 103, Fig. 2, into the position shown in Fig. 2, the upper end of the link m 'passing dead-center and meeting a stop-pin m and at the same time a starting-pin m on the disk will be located just in advance of a pawl 72, mounted on a collar n, secured to the shipper-rod. (See Fig. 2.) When the shipper-rod is moved to the left, Fig. 2, the pawl will engage the pin m and thereby turn the disk m far enough to throw the link m beyond dead-center, and immediately thereafter the actuator W will be free to act to apply the brake as the shipper-rod reaches its final position for stopping. (Shown in Fig. 2.)

The prevention of singles and the stoppage of the apparatus herein described is effected upon failure of any sliver, and by the term failure I mean either the breakage of a sliver or, what is quite as important, the running out of a sliver from the bobbin from which it is drawn. These bobbins to a large number are mounted on a stand at the back of the frame in well-known manner, and it is not only very difficult but practically impos sible for the attendant to keep a strict watch on all of the bobbins to see that they do not run out.

By my invention the frame is stopped automatically when a sliver runs out and the attention of the operator is at once directed to the fault by such stoppage, and the par- IIO ticular sliver which has run out or which has 2 broken is indicated by the abnormal of thehead of its detector.

The formation of singles by running out is now very common, and manifestly without proper checking means a sliver may run out for some time before the operative discovers it. This is absolutely prevented by the mechanism herein shown,

The mechanism hereinbeforedescribed,and illustrated in the accompanying drawings,embodies one practical embodiment of my invention in the bestform now known to me; but manifestly various changes or modifications may be made in construction and arrangement of the several parts by those skilled in the art without departing-from the spirit and scope of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- I 1. In apparatus of I the class described, means to move and toguide a plurality of sets of slivers in pairs, two series of pivotally mounted detectors each having a sliver-engaging portion, one sliver of each set normally maintaining inoperative a detector of one seposition ries, the other slivers similarly controlling the detectors of the other series, the sliverengaging portions of the two series extending in opposite directions and such portions of one series of detectors having downturn'ed books, a normally vibrating feeler longitudinally movable below the detectors and havin g shoulders on its upper face, whereby a released detector having a hook will arrest the feeler and be subjected to tensile'strain, a detector of the other series being subjected to compressive strain when released and engaging a shoulder of the feeler, to arrest the latter, and stopping means for the-apparatus, operated by or through arrest of the feeler.

2. In apparatus of the class described, means to move and to guide a plurality of sets of slivers, stop-motion detectors controlled by the latter, a longitudinally-movable feeler to be engaged and arrested on its feeling stroke by a released detector, a spring to efiect such stroke of the feeler,,means to positively move it on the opposite stroke, including a rockshaft provided with a pin, stopping means operated by or througharres't of the feeler, and means including a swinging cam-hook to engage the pin and turn the rock-shaft to automatically move the feeler away from a released detector sulficiently to free the latter.

3. In apparatus of the class described, means to move and to guide a plurality of sets of slivers, stop-motion detectors controlled by the latter, said detectors being arranged in two seriesand each comprising an upturned head and a laterally-extended arm to restupon a sliver, the arms of one series having downturned hooks and being extended oppositely to the arms of the detectors of the other series, the detectors being arranged in pairs, a longitudinally reciprocating feeler having stop-shoulders, onefor each pair of detectors, to be engaged by a,released detector and arrested thereby, and lstoppingmeans operated by or through arrest of the feeler.

4:. In apparatus of the class described, means to move the slivers,two adjacent guidebars arranged in parallelism, to direct the slivers, pivotallymounted stop-motion'detectors located between the guide-bars and adapted to engage andbe normally maintained inoperative by the slivers, a feeler longitudinally movable between the guide-bars andbelow the detectors, means to normally reciprocate the feeler, engagement of the latt ter by a released detector arresting its movement, a bunter rendered operative by the feeler when arrestedgand stopping means actuated by or through the hunter when oper-' ative. v n

5. In apparatus of the class described, means to move and to guide a plurality of sets of slivers, stop-motion detectorscontrolled by the latter, a longitudinally-movable feeler, means to yieldingly move it in one direction, means, including a cam, to move it in the opposite direction, a hunter movable into and out of the path of the cam by the reciprocation of the feeler, arrest of the latter by ongagement with a released detector holding the bunter in the cam-path, and stopping means operated by or through the bunter when engaged by the cam.

6. In apparatus of the class described, means to move and to guide a plurality of sets of slivers, stop-motion detectors controlled by the latter, a longitudinally-movable feeler,

.means to yieldingly" move it in one direction, .means, including a cam, to move it in the opposite direction, a rocking bu nter bodily movable into and out of the path of the cam by the reciprocation ot' the feeler, arrest of the latter by engagementwith a released detector maintaining the hunter in the path of and to be rocked by the cam, and stopping means operated by rocking of the bunter.

7. In apparatus of the class described, means to move and to' guide a plurality of sets of slivers, stop-motion detectors controlled by the latter, a longitudinally-movable feeler, means to yieldingly move it in one direction, means, including a cam, to move it in the opposite direction, a bunter movable into and IIO means to move and toguide a plurality of sets in one direction, means, including a rockshaft and an operating-cam, to move it in the other direction, a pivotally-mounted hunter connected with the feeler'and movable thereby bodily on its fulcrum'into and out of the path of the cam, stoppingineans, and a knockoff lever thereforactuated by the hunter when engaged and rocked by the cam.

9. In apparatus of the class described, means to move and guide a plurality of sets of slivers in pairs, stop-motion detectors arranged in pairs to cooperate with the slivers ofa set and normally maintained inoperative thereby, said detectors. being located at a distance from the means for moving the slivers, a normally vibrating feeler to engage and be arrested by a detector released by failure of its sliver, a hunter, a cam to rock it when said hunter is operatively positioned by or through arrest of the feeler, stopping means actuated by rocking movement of the hunter, and a device to move the feeler away from its arresting-detector upon actuation of the stopping means, to relieve the detector from strain.

10. In apparatus of the class described, drawing-rolls and guides for the slivers, stopmotion detectors controlled by the slivers, a feeler to he engaged and arrested by a released detector, a spring to elfect the feeling move ment of said feeler, means to positively move it in the opposite direction, said means including a tappet-cam, a hunter, a fulcrum on which it can rock and slide, connections between the feeler and hunter, to slide the latter into the path of the cam on the positive stroke of the former, arrest of the feeler positioning the hunter in the path of and to be rocked by the cam, stopping means operated by rocking movement of the hunter, and separate means actuated by the hunter to move the t'eeler away from its arresting-detector when the stopping means is actuated.

11. In apparatus of the class described, drawing-rolls and guides for the slivers, stopmotion detectors controlled by the slivers, a feeler to be engaged and arrested by a released detector, a spring to effect the feeling movement of said feeler, means to positively move it in the opposite direction, said means including a cam, a hunter movable into the path of the cam by or through arrest of the failure of its sliver, stopping means operative by or through arrest of the feeler to stop said actuating mechanism and thereby effect the stoppage of all of said drawing and evening devices, and means actuated upon the operation of the stopping means to move the feeler sufficiently to release the engaged detector from strain.

13. In apparatus of the class described, a plurality of drawing and evening devices to act upon a corresponding number of sets of slivers, a common actuating mechanism for the entire series of said devices, guides for the slivers, stop-motion detectors adjacent the guides, and normally maintained inoperative by the slivers, stopping means for said actuating mechanism, operative by or through release of a detector due to failure of its sliver, to thereby stop the operation of all said drawing and evening devices, and blade-like, upright separators behind the guides, to prevent interference between the slivers of a set.

14. In apparatus of the class described, means to move the sets of slivers, a guide-bar having guide-eyes arranged in pairs to receive and direct the slivers of a set, upright separators on the guide-bar and located between the guide-eyes of a pair at the inlet side thereof, to prevent interference between the slivers directed through the guide-eyes, stop-motion detectors normally maintained inoperative by the slivers, and stopping means, operative by or through release of a detector due to failure of its sliver, to stop the means for moving all of the sets of slivers.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES T. HAVVLEY.

Witnesses:

GEORGE OTIS DRAPER, EDWARD F. ALLEN.

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